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package app.fedilab.android.mastodon.ui.fragment.timeline;
/* Copyright 2022 Thomas Schneider
*
* This file is a part of Fedilab
*
* This program is free software; you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* Fedilab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along with Fedilab; if not,
* see <http://www.gnu.org/licenses>. */
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import androidx.preference.PreferenceManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import app.fedilab.android.BaseMainActivity;
import app.fedilab.android.R;
import app.fedilab.android.databinding.FragmentPaginationBinding;
import app.fedilab.android.mastodon.activities.SearchResultTabActivity;
import app.fedilab.android.mastodon.client.entities.api.Tag;
import app.fedilab.android.mastodon.client.entities.app.Timeline;
import app.fedilab.android.mastodon.helper.Helper;
import app.fedilab.android.mastodon.helper.MastodonHelper;
import app.fedilab.android.mastodon.ui.drawer.TagAdapter;
import app.fedilab.android.mastodon.viewmodel.mastodon.SearchVM;
import app.fedilab.android.mastodon.viewmodel.mastodon.TimelinesVM;
public class FragmentMastodonTag extends Fragment {
private FragmentPaginationBinding binding;
private TagAdapter tagAdapter;
private String search;
private Timeline.TimeLineEnum timelineType;
private Integer offset;
private boolean flagLoading;
private List<Tag> tagList;
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
if (getArguments() != null) {
search = getArguments().getString(Helper.ARG_SEARCH_KEYWORD, null);
timelineType = (Timeline.TimeLineEnum) getArguments().get(Helper.ARG_TIMELINE_TYPE);
}
binding = FragmentPaginationBinding.inflate(inflater, container, false);
SharedPreferences sharedpreferences = PreferenceManager.getDefaultSharedPreferences(requireActivity());
boolean displayScrollBar = sharedpreferences.getBoolean(getString(R.string.SET_TIMELINE_SCROLLBAR), false);
binding.recyclerView.setVerticalScrollBarEnabled(displayScrollBar);
return binding.getRoot();
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
binding.loader.setVisibility(View.VISIBLE);
binding.recyclerView.setVisibility(View.GONE);
offset = 0;
flagLoading = false;
binding.swipeContainer.setRefreshing(false);
binding.swipeContainer.setEnabled(false);
router();
}
/**
* Router for timelines
*/
private void router() {
if (search != null && timelineType == null) {
SearchVM searchVM = new ViewModelProvider(FragmentMastodonTag.this).get(SearchVM.class);
searchVM.search(BaseMainActivity.currentInstance, BaseMainActivity.currentToken, search.trim(), null, "hashtags", false, true, false, offset, null, null, MastodonHelper.SEARCH_PER_CALL)
.observe(getViewLifecycleOwner(), results -> {
if (results != null && results.hashtags != null && offset == 0) {
initializeTagCommonView(results.hashtags);
} else if (results != null && results.hashtags != null) {
dealWithPaginationTag(results.hashtags);
}
});
} else if (timelineType == Timeline.TimeLineEnum.TREND_TAG) {
TimelinesVM timelinesVM = new ViewModelProvider(FragmentMastodonTag.this).get(TimelinesVM.class);
timelinesVM.getTagsTrends(BaseMainActivity.currentToken, BaseMainActivity.currentInstance, offset, MastodonHelper.SEARCH_PER_CALL)
.observe(getViewLifecycleOwner(), tags -> {
if (tags != null && offset == 0) {
initializeTagCommonView(tags);
} else if (tags != null) {
dealWithPaginationTag(tags);
}
});
}
}
public void scrollToTop() {
binding.recyclerView.setAdapter(tagAdapter);
}
private void dealWithPaginationTag(final List<Tag> tags) {
if (binding == null || !isAdded() || getActivity() == null) {
return;
}
if (tags == null || tags.size() == 0) {
flagLoading = true;
binding.loadingNextElements.setVisibility(View.GONE);
return;
}
offset += MastodonHelper.SEARCH_PER_CALL;
binding.swipeContainer.setRefreshing(false);
binding.loadingNextElements.setVisibility(View.GONE);
flagLoading = false;
int start = tagList.size();
tagList.addAll(tags);
tagAdapter.notifyItemRangeInserted(start, tags.size());
}
/**
* Intialize the view for tags
*
* @param tags List of {@link Tag}
*/
private void initializeTagCommonView(final List<Tag> tags) {
if (binding == null || !isAdded() || getActivity() == null) {
return;
}
tagList = new ArrayList<>();
binding.loader.setVisibility(View.GONE);
binding.noAction.setVisibility(View.GONE);
binding.swipeContainer.setRefreshing(false);
binding.swipeContainer.setOnRefreshListener(() -> {
binding.swipeContainer.setRefreshing(true);
router();
});
if (tags == null || tags.size() == 0) {
if (requireActivity() instanceof SearchResultTabActivity) {
((SearchResultTabActivity) requireActivity()).tagEmpty = true;
if (((SearchResultTabActivity) requireActivity()).accountEmpty != null) {
if (((SearchResultTabActivity) requireActivity()).accountEmpty) {
((SearchResultTabActivity) requireActivity()).moveToMessage();
} else {
((SearchResultTabActivity) requireActivity()).moveToAccount();
}
}
}
binding.recyclerView.setVisibility(View.GONE);
binding.noAction.setVisibility(View.VISIBLE);
binding.noActionText.setText(R.string.no_tags);
return;
}
if (search != null) {
Collections.sort(tags, (obj1, obj2) -> Integer.compare(obj2.getWeight(), obj1.getWeight()));
boolean isInCollection = false;
for (Tag tag : tags) {
if (tag.name.compareToIgnoreCase(search) == 0) {
isInCollection = true;
break;
}
}
if (!isInCollection) {
Tag tag = new Tag();
tag.name = search;
tag.history = new ArrayList<>();
tags.add(0, tag);
}
}
offset += MastodonHelper.SEARCH_PER_CALL;
binding.recyclerView.setVisibility(View.VISIBLE);
binding.noAction.setVisibility(View.GONE);
tagList.addAll(tags);
tagAdapter = new TagAdapter(tagList);
LinearLayoutManager mLayoutManager = new LinearLayoutManager(requireActivity());
binding.recyclerView.setLayoutManager(mLayoutManager);
binding.recyclerView.setAdapter(tagAdapter);
binding.recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
int firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
if (dy > 0) {
int visibleItemCount = mLayoutManager.getChildCount();
int totalItemCount = mLayoutManager.getItemCount();
if (firstVisibleItem + visibleItemCount == totalItemCount) {
if (!flagLoading) {
flagLoading = true;
binding.loadingNextElements.setVisibility(View.VISIBLE);
router();
}
} else {
binding.loadingNextElements.setVisibility(View.GONE);
}
}
}
});
}
}
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